Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Pull more networking updates from David Miller:

 1) If a VXLAN interface is created with no groups, we can crash on
    reception of packets.  Fix from Mike Rapoport.

 2) Missing includes in CPTS driver, from Alexei Starovoitov.

 3) Fix string validations in isdnloop driver, from YOSHIFUJI Hideaki
    and Dan Carpenter.

 4) Missing irq.h include in bnxw2x, enic, and qlcnic drivers.  From
    Josh Boyer.

 5) AF_PACKET transmit doesn't statistically count TX drops, from Daniel
    Borkmann.

 6) Byte-Queue-Limit enabled drivers aren't handled properly in
    AF_PACKET transmit path, also from Daniel Borkmann.

    Same problem exists in pktgen, and Daniel fixed it there too.

 7) Fix resource leaks in driver probe error paths of new sxgbe driver,
    from Francois Romieu.

 8) Truesize of SKBs can gradually get more and more corrupted in NAPI
    packet recycling path, fix from Eric Dumazet.

 9) Fix uniprocessor netfilter build, from Florian Westphal.  In the
    longer term we should perhaps try to find a way for ARRAY_SIZE() to
    work even with zero sized array elements.

10) Fix crash in netfilter conntrack extensions due to mis-estimation of
    required extension space.  From Andrey Vagin.

11) Since we commit table rule updates before trying to copy the
    counters back to userspace (it's the last action we perform), we
    really can't signal the user copy with an error as we are beyond the
    point from which we can unwind everything.  This causes all kinds of
    use after free crashes and other mysterious behavior.

    From Thomas Graf.

12) Restore previous behvaior of div/mod by zero in BPF filter
    processing.  From Daniel Borkmann.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (38 commits)
  net: sctp: wake up all assocs if sndbuf policy is per socket
  isdnloop: several buffer overflows
  netdev: remove potentially harmful checks
  pktgen: fix xmit test for BQL enabled devices
  net/at91_ether: avoid NULL pointer dereference
  tipc: Let tipc_release() return 0
  at86rf230: fix MAX_CSMA_RETRIES parameter
  mac802154: fix duplicate #include headers
  sxgbe: fix duplicate #include headers
  net: filter: be more defensive on div/mod by X==0
  netfilter: Can't fail and free after table replacement
  xen-netback: Trivial format string fix
  net: bcmgenet: Remove unnecessary version.h inclusion
  net: smc911x: Remove unused local variable
  bonding: Inactive slaves should keep inactive flag's value
  netfilter: nf_tables: fix wrong format in request_module()
  netfilter: nf_tables: set names cannot be larger than 15 bytes
  netfilter: nf_conntrack: reserve two bytes for nf_ct_ext->len
  netfilter: Add {ipt,ip6t}_osf aliases for xt_osf
  netfilter: x_tables: allow to use cgroup match for LOCAL_IN nf hooks
  ...

4 files changed, 28 insertions, 21 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index 757063420ce..14dac0654f2 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4043,6 +4043,7 @@ static void napi_reuse_skb(struct napi_struct *napi, struct sk_buff *skb)
 	skb->vlan_tci = 0;
 	skb->dev = napi->dev;
 	skb->skb_iif = 0;
+	skb->truesize = SKB_TRUESIZE(skb_end_offset(skb));
 
 	napi->skb = skb;
 }
@@ -4588,8 +4589,7 @@ void *netdev_lower_get_next_private(struct net_device *dev,
 	if (&lower->list == &dev->adj_list.lower)
 		return NULL;
 
-	if (iter)
-		*iter = lower->list.next;
+	*iter = lower->list.next;
 
 	return lower->private;
 }
@@ -4617,8 +4617,7 @@ void *netdev_lower_get_next_private_rcu(struct net_device *dev,
 	if (&lower->list == &dev->adj_list.lower)
 		return NULL;
 
-	if (iter)
-		*iter = &lower->list;
+	*iter = &lower->list;
 
 	return lower->private;
 }
@@ -5696,6 +5695,13 @@ static netdev_features_t netdev_fix_features(struct net_device *dev,
 		}
 	}
 
+#ifdef CONFIG_NET_RX_BUSY_POLL
+	if (dev->netdev_ops->ndo_busy_poll)
+		features |= NETIF_F_BUSY_POLL;
+	else
+#endif
+		features &= ~NETIF_F_BUSY_POLL;
+
 	return features;
 }
 
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 30071dec287..640ba0e5831 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -97,6 +97,7 @@ static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN]
 	[NETIF_F_RXFCS_BIT] =            "rx-fcs",
 	[NETIF_F_RXALL_BIT] =            "rx-all",
 	[NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
+	[NETIF_F_BUSY_POLL_BIT] =        "busy-poll",
 };
 
 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
diff --git a/net/core/filter.c b/net/core/filter.c
index 765556ba32e..e08b3822c72 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -295,43 +295,43 @@ select_insn:
 		(*(s64 *) &A) >>= K;
 		CONT;
 	BPF_ALU64_BPF_MOD_BPF_X:
+		if (unlikely(X == 0))
+			return 0;
 		tmp = A;
-		if (X)
-			A = do_div(tmp, X);
+		A = do_div(tmp, X);
 		CONT;
 	BPF_ALU_BPF_MOD_BPF_X:
+		if (unlikely(X == 0))
+			return 0;
 		tmp = (u32) A;
-		if (X)
-			A = do_div(tmp, (u32) X);
+		A = do_div(tmp, (u32) X);
 		CONT;
 	BPF_ALU64_BPF_MOD_BPF_K:
 		tmp = A;
-		if (K)
-			A = do_div(tmp, K);
+		A = do_div(tmp, K);
 		CONT;
 	BPF_ALU_BPF_MOD_BPF_K:
 		tmp = (u32) A;
-		if (K)
-			A = do_div(tmp, (u32) K);
+		A = do_div(tmp, (u32) K);
 		CONT;
 	BPF_ALU64_BPF_DIV_BPF_X:
-		if (X)
-			do_div(A, X);
+		if (unlikely(X == 0))
+			return 0;
+		do_div(A, X);
 		CONT;
 	BPF_ALU_BPF_DIV_BPF_X:
+		if (unlikely(X == 0))
+			return 0;
 		tmp = (u32) A;
-		if (X)
-			do_div(tmp, (u32) X);
+		do_div(tmp, (u32) X);
 		A = (u32) tmp;
 		CONT;
 	BPF_ALU64_BPF_DIV_BPF_K:
-		if (K)
-			do_div(A, K);
+		do_div(A, K);
 		CONT;
 	BPF_ALU_BPF_DIV_BPF_K:
 		tmp = (u32) A;
-		if (K)
-			do_div(tmp, (u32) K);
+		do_div(tmp, (u32) K);
 		A = (u32) tmp;
 		CONT;
 	BPF_ALU_BPF_END_BPF_TO_BE:
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index d0dac57291a..d068ec25db1 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -3340,7 +3340,7 @@ static void pktgen_xmit(struct pktgen_dev *pkt_dev)
 
 	__netif_tx_lock_bh(txq);
 
-	if (unlikely(netif_xmit_frozen_or_stopped(txq))) {
+	if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
 		ret = NETDEV_TX_BUSY;
 		pkt_dev->last_ok = 0;
 		goto unlock;